#pragma warning(disable:4996)
#pragma warning(disable:6031)

#include <iostream>

namespace xxx
{
	void Swap(int& x, int& y)
	{
		int tmp = x;
		x = y;
		y = tmp;
	}
}

int main()
{
	int x = 3;
	int y = 5;
	xxx::Swap(x, y);
	std::cout << "x = " << x << "," << "y = " << y << std::endl;
	return 0;
}